D3DXPlaneDot function
Note
The D3DX utility library is deprecated. We recommend that you use DirectXMath instead.
Computes the dot product of a plane and a 4D vector.
Syntax
FLOAT D3DXPlaneDot(
_In_ const D3DXPLANE *pP,
_In_ const D3DXVECTOR4 *pV
);
Parameters
-
pP [in]
-
Type: const D3DXPLANE*
Pointer to a source D3DXPLANE structure.
-
pV [in]
-
Type: const D3DXVECTOR4*
Pointer to a D3DXVECTOR4 structure.
Return value
Type: FLOAT
The dot product of the plane and 4D vector.
Remarks
Given a plane (a, b, c, d) and a 4D vector (x, y, z, w) the return value of this function is a*x + b*y + c*z + d*w. The D3DXPlaneDot function is useful for determining the plane's relationship with a homogeneous coordinate. For example, this function could be used to determine if a particular coordinate is on a particular plane, or on which side of a particular plane a particular coordinate lies.
Requirements
| Requirement | Value |
|---|---|
| Header |
|
| Library |
|
See also